Casing hook



F. J. YOUNG Dea. 16, 1924` CASKING HOOK Filed OCB. 27. 1923 NiciPatented Dec. 16, 1924.

UNITED siuaras A s 1,519,430 vPA'rlsziar OFFICE FORRESTJ. YOUNG, OFTORBANCE, CALIFORNIA,l ASSIGNDR TO UNION TOOL COMPANY,

or 'roRRANcn, CALIFORNIA, A.

CASING Hook.

CORLOM'IION OF CALIFORNIA.

Applicatioaiea octoberA a?, .19.23. seal No. 671,194.

r 1o ticularly to the type of casing hook which,

employs a spring 1n itsconstruction` to sup# port the weight of thecasing carried b the liook. T-he springs of casing hooks o this type arefrequently broken. Furthermore,

as now constructed, these hooks are mounted to rotate on a horizontalaxis on the supporting yoke and the center of gravity of the lhook andits associated parts are so located that the hook Vdoes not I'hang`freely in a' verticalv position. It is also possible for a foreign bodyto find its way into the space between the Vcoils. of the spring tendingtobreak the spring or interfere with itsoperation. This follows because,as usually Aconstructed the coils of the Aspringare-exposed and for thisreasondt is also possible or fa workman to have his ngers caughtandinjured by the; coils of the spring. These hooksare usuallymountedron a swivel bearing. The weight of the casing supported on thisswivel is sometimes very great so that if `a. roller bearing is employedthe rollers are subjected to great forces.l n

The general object of this invention is to provide a hook of this typeof simpleJ` construction, operating'in such a .way that there is a limitto the force to which the spring can be subjected; also to provideahoolo of -this type constructed in s uch a way that a spring ofincreased length can be em'- -ployed without increasing the overalllength ofthe casing hook, 4and to mount thev spring so that 'its coilsare not exposed. l A further object of the invention is to provide sucha hook with a swivel-bearin havingv ineansfor limiting the forces whichmust be sustained by the bearing; and to'provide "simple meanscontrolled at will for supporting the weight of the hook soas to relievethe bearing of pressure, vor in such away as to take all theweight onthe swivel bear ing. A further object of the invention is tol providesimple means for locking the parts of the bearing together, at will, toprevent free rotation of the hook. f

Further objects of the invention apvpear hereinafter.

The invention consists in the lncivel` parts .andcombination of parts tobe described hereina-fter, all of which contribute to 'produce aneiicient casing hook.

A preferred embodiment of the invention is described in the followingvspeciiication while the broad scope 'pfthe invention is pointed out'vin the appended claims.

In the drawings: f1 Figure 1 is. a side elevation. and partial verticalsection taken througha hook ern- Fig. 2 is a view similar to" Fig. lwith the lower portion of the hook broken away, and illustrating anotherembodiment of the invention in which, after'a certain amount of 1distortion 0f the spring has taken place,

no furtlier distortion can occur, and'at ythe same time, the swivelbearing is relieved of employ, at will, to enable the bearing tovcontinue to sustain all the weight even after the distortion-.of thespring lias reached its` desired limit.

valarg'e portion of' the weight on the hook. 1

Fig. 4 is a vertical section taken at the upper end 'of the shank ofthe'hook and showing'an embodiment of the. invention in. which the-upperbearing member is formed as a part of a nut secured to the hook.

' Fig. 5 is a cross section taken through the hook on theli'ne 5-5 ofFig. 1,

-Fig. 6 is a vertical section illustrating a type of locking pin forthe' swivelbearing which is shown in Fig. 4, and

Fig.' 7 is a cross section upon an enlarged scale taken through the pinshownin Fig. 6, just below thehead.

In practising my invention QI/provide means'such as a yoke forsupporting the hook, and I prefer tosupport the same on a swivel bearingwhich is in turn supported on a spring. -The swivel bearing includes twocooperating bearing members, and I provide means forlimiting'themovement of one of the ybearing members when the spring is distortedunder the actiony of the load, operating to prevent further distortionof the spring and limiting the pressure upon the'bearing. vHowever, Iconstruct the device in vsuch a way that if rdesired it can be madev tooperate so that, at will, the entire roo :soV

load vma be taken upon the bearing, although t ere is a limit to the'amount o f dlstortion which 'can take placein the s ring. I

also construct the casing hook in'suc awaiyl means such as a yoke 1forsupporting the yoke@ throughl the agency of agsprmg hook 2, said hookhaving a shank 3 which extends upwardly and is supported by the 4.

This spring is supported and guided through a spring barrel 5 which iscarried in a cross- '.head 6 'rovided with trunnions 7 received in theorks of the yoke, and enable the hook to rock on a horizontal axis.

The central portion of the cross-head is formed with a center bore 8which receives a tubular neck 9 on the barrel 5 which fits into it.

-The upper portion of the barrel 5 is formed Iwith an annular shoulder10 which rests on the upper face of'thecross-head to support the barrel.The spring 4 is enveloped by the barrel and the upper end of the barrelis enlarged into a head 11 of increased diameterl which carries a'counterbore'or chamber 12. The spring 4 has its seat at the lower endof the barrel and extends up into this chamber 12, and supports the hookby thrusting upwardlyy against acollar 13, loose on the shank 3 andwhich constitutes'the lower member of aj swivel bearing, the up er ingmember directly. In order to accomphsh this I construct the casing hookin such a way that as the shank descends to a certain point the upperbearing member will be held against. any further downward movement; inother words, I limit the downward movement of the upper bearing member.

vThis el'ect may be very simply attained by I formin an upper bearingmember or collar 17 (seehg. 2) so that. it projects outwardly beyond theperiphery of the lower bearing member or collar 18. I provide theI upperend of the spring barrel 19 with a supplementary annular shoulderl20which will permitthe collar 18to pass down but which will lengage theedge of the upper collar 17.

With this Organization of parts it will be evident that when the collar17 rests upon the shoulder 20 no further distortion of the spring can'take place, and the weight'on the hook will not be supported throughthe bear` ving but directly by the barrel 19 of course, the spring isStill subjected to the loadlwhich compressed it but the amount ofthisload is, of course, limited.

' I prefer to construct the casing hook,

however, in 'such a way thatifl desired, the

weight can be supported through the swivel i pins 23 are in positionthey will'be engaged by the under side of the lower member 'or member ofwhich is in the form of a col lar;v collar, 24 of the swivel bearing,tand this that its upper face seats against a nutl which is screwed ontothreads at the upper end .of the shank. Between the collars 13 and 14 a.race-Way may be formed for rollers or bearing cones 16. At the lower endof the chamber 12 an annular formed.

With a hook embodying they features of.

my invention as' described, and -as exem-` plified in Fig.v 1, it willbe evident that when;

a sufficient load is placed on the hook 2 the;` .spring 4 will becompressed and the collary will eventually seat upon the annularshoulder 17. VThis will prevent' any further distortion taking place inthe spring and the entire weight ofthe load will then be supported onthe swivel bearing.l

' As illustrated in Fig. 2, the bearing niembers are represented as soconstructed that when the distortion of the spring is sufficient, "mofurther distortion of the spring will take place, but the wei ht vof thehook will not be supported upon t e swivel bearing, but instead, will besupported on thejupper bea-rshoulder 17 is.

engagement will take place before 'th'e upper collar 25 engages-the`annular shoulder 26 i which corresponds to the annular shoulder \tortionof the spring is limited` but the xported on the swivel bearing.

ing operation of the swivel bearing, at will,

27 which is attached by a chain 28. This .pin may be passed downwardlyfrom above through two aligning openings in the edges` of the collars 24and 25. (See Fig.`- yThe spring 4 is preferably not constructed in oneentire piece but is lformed intwo sections 4 and 4b (see Fig. 3) whichare separated by a washer 29. This washer is in the lower parts of thebarrel. If a coil breaks, it will not. make it Inecessary to reconstructthe spring, as another spring section canbe 4immediately substituted.

Instead of constructing the upper bearing member as a collar distinctfrom the nut 'I .may construct these parts so that the I provide anysuitable means for prevent-;`I`v

.Weight of the load will nevertheless be sup` and'this 'is in the formof a removable pin 11/5 nut 30. which screws on to the '"upper end ofthe shank 3l is provided with adown wardly projecting rim or skirt 32which projects beyond the edge of the lowerbearing member or collar 38(see Fig. 4), so that it may engage an annular shoulder 34 ornedI on theupper endof theibarrel and corresponding to the annular shoulders 20 and26 already described. As illustrated in Fig. 4, the parts arerepresented with the spring 35 at the limit of its distortion and theweight is being taken .on removable pins 36 corresponding tothe pins 23already described. When these pins 36 are removed, however, the lowerend of the skirt 32 will come against the shoulder 3 4 so thatv the loadacting upon the swivel bearing will be relieved.

ln Fig. 4 I have illustrated a type of locking pin 37 which iscontrolled by a springtending to project the pin down into its lockingposition. The pin,-h0rwever, mavl be pulled up at will and withdrawnposition.

The construction illustrated clearly in Figs. 6 and low'er portionorhead of the pin is guided vertically in the 'skirt 32 of the nut 30,

and the upper portion of the pin is in the -form of a stem 38aroundwhich a: coill spring 39 is placed which thrusts downward* lyagainst the enlarged head'40.v The upper end of the stem 38 passesthrough and beyond a guide plug 41 and carries a thumb head 42. Theupper end of the guide 41 is vprovided with a vertical.diametricallydisposed slot 43 which receives a cross pin 44 carried by the stem 38.By pulling the stem "38 upwardly this cross pin 44 may be brought out ofthe slot 43, and the stein .may then be rotated on its axis so. as tolet the cross pin rest in a transverse gro'ove '45 cut in the upper faceof the guide. In this way the pin may be locked withits head withdrawninto the skirt. I

It is understood that the embodiment of the invention described 'hereinis only one of the many embodiments this invention may take and l do notwish to be limited in the practice of my invention nor in my claims tothe particular embodiment set forth.

l claim:

1. In a casing hook, in combinatioin'al yoke, a spring supportedthereby, a hook.

having a swivel bearing supported on the spring and including twocooperating bearing members, and means engaging the upper y of saidmembers for limiting the movement thereof when the spring is distortedyunder the action of the load, operating to prevent further distortion ofthe spring and limit thepressure upon the bearing.

2. ln a casing hook, in combination, a

yoke, a spring supported thereby, .ahook Ymember receiving the thrust ofthe spring,

vlocked in aof this springpin is,

. and a spring barrel receiving the spring and .ment of the lowerbearing member instead .limit the pressure .upon the bearing.

3^. In a lcasing hook, in combination, a yoke, \a spring supportedthereby, a hook 'having a swivel bearing supported on the spring andincluding an upper bearing mein\V ber carried'by thevhook and a lowerbearing means for engaging the upper bearing mem` ber to lifmit itsmovement when the spring is distorted under the action of the load,operating to prevent further distortion of the spring and limit thepressure upon the bearing, and means for lockingthe bearingv membersyagainst rotation 'with respect to each other.'

4. ln a casing hook, in combination, a yoke, a spring supported thereby,a hook having a. swivel bearing supported'on the spring and including anupper bearing meniber carried by the Ihook land a lower bearingmemberfreceiving the thrust of the spring,

having means engaging the upper bearing member when the spring isdistorted under the action of the load, operating to prevent furtherdstortion of the spring .and limit the pressure upon theV bearing.

5.- In a `casing hook, in combination, a yoke, a spring supportedthereby, a hook having al swivel bearing supported on the Ispring andincluding a lower bearing member and an upper bearing member projectingdownwardly beyond the lower bearing member, the lower bearing'memberreceiving the thrust of the spring, and meansv forfengag# ing `the upperbearing memberl lor limiting the movement thereof when the spring isdistorted under the action of thetload, operating to prevent furtherdistortion of the spring and to .relieve thebearing from a portion ofthe load carried by the hook.

6. In a casing hook, in combination, a yoke, a spring supported.thereby, ahook having a swivel bearing Supported on the spring andincluding a lower bearing member and an upper bearing member projectingdownwardly beyond the lower bearing member, the lower bearing memberreceiving the thrust of the spring, ymeans for l engaging the upperbearing member for limiting the movement thereof when the spring isdistorted under the action of the loa-d, operating to prevent furtherdistortion of the spring and to relievethe bearing from a portion of theload carried by the hook, and removable means. for limiting -the movellolil)

l of the upper bearing member, opena'ting to prevent furtherdistortionof the Spring but ,i leaving'the entire load supported ontheHswivel bearing.

In a casing' hook, 1n combination, a

yoke, a cross-'head supportedon 'the -yoke i andl having a 'spring seatlocated below the yoke, aspri'ng supported below the yoke on' the springseat, and a hook. supported on the spring.

`8. In a casing hook, `in combination, a

l y yoke, a cross-heatpivo-tally supported on the yoke and having aretalningsleeve providing a spring seat located below the .pvot-v alsupports of the yoke, a spring supported on the spring seat in theretaining sleeve,

and a hook supported 'on the spring.

9. In a casing hook, in combination, a yoke, a` cross-head supportedthereby a spring barrel supported in the cross-head and extending belowthe same, a hoo-k having a shank guided to slide through the bar--V rel,a coil spring surrounding the shank seat-- ing in the barrel below thecross head, a swivel bearing enclosed 'by the barrel for supporting thehook and having a. loose collar on the shank receiving the upwardIthrust of the spring and an upper fixed collar carried the'shank'andsupported on the loose collar, said barrel havinga shoulder to engagethe fixed collar and limit the distortion of the spring underthe actionof the' load on the hook.

' l0. In a casing hook, in combination, al

swivel bearing for supporting the hook including a loose collar on theshank receiving the upward thrust of the. spring, and an upper fixedcollar in the form of' a nut carried'by the shank and supported on t-heloose.

collar, said barrel having a shoulder to engage the fixed" collar andVlimit the distortion of the spring 'under the actionof the load on thehook, a removable pin carried' by the vbarrel for engaging the lowercollar when in place, operating to llimit the distortion of the springbut operatingto carry all 'of the load on the bearing. f

Signed at Torrance, Cal., this 15th day of October, 1923.

FoRREsT J. 'Ycjurre` o

